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Articles 2911 - 2940 of 4850

Full-Text Articles in Engineering

Configurable Multiprocessor System Design, Jordan Anderson, Dr. Doran Wilde Oct 2013

Configurable Multiprocessor System Design, Jordan Anderson, Dr. Doran Wilde

Journal of Undergraduate Research

The goal of this project was to write a hardware description of a new microprocessor in a language called VHDL that can be built inside a field-programmable gate array (FPGA). The processor will run real-time applications and take advantage of the programmability of FPGA hardware by implementing several functions that are typically done in software, such as task resource allocation. The description will be used to create multiple processors that function together in one FPGA.

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The Development Of Updated And Improved Slw Model Parameters And Its Application To Comprehensive Combustion Predictions, John T. Pearson Oct 2013

The Development Of Updated And Improved Slw Model Parameters And Its Application To Comprehensive Combustion Predictions, John T. Pearson

Theses and Dissertations

Accurate modeling of radiative heat transfer through combustion gases has received considerable attention in recent years. The spectral line weighted-sum-of-gray-gases (SLW) model was developed based on detailed line-by-line spectral data of gases. A critical element of the SLW model is the absorption line blackbody distribution function (ALBDF). This function was designed to utilize the spectral properties of gases in an efficient and compact manner. However, there are several limitations of the ALBDF in its original form. First, the valid ranges of temperature and pressure are not large enough to include important applications, such as oxy-combustion, where temperatures can exceed 2500 …

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Cell-Free Unnatural Amino Acid Incorporation With Alternative Energy Systems And Linear Expression Templates, Prashanta Shrestha, Mark Thomas Smith, Bradley Charles Bundy Oct 2013

Cell-Free Unnatural Amino Acid Incorporation With Alternative Energy Systems And Linear Expression Templates, Prashanta Shrestha, Mark Thomas Smith, Bradley Charles Bundy

Faculty Publications

Site-specific incorporation of unnatural amino acids (uAAs) during protein synthesis expands the proteomic code through the addition of unique residue chemistry. This field provides a unique tool to improve pharmacokinetics, cancer treatments, vaccine development, proteomics and protein engineering. The limited ability to predict the characteristics of proteins with uAA-incorporation creates a need for a low-cost system with the potential for rapid screening. Escherichia coli-based cell-free protein synthesis is a compelling platform for uAA incorporation due to the open and accessible nature of the reaction environment. However, typical cell-free systems can be expensive due to the high cost of energizing …

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Real-Time Color Treebasis Feature Matching On A Limited-Resource Hardware System, Garrett Sean Hartman Oct 2013

Real-Time Color Treebasis Feature Matching On A Limited-Resource Hardware System, Garrett Sean Hartman

Theses and Dissertations

This research has been conducted in order to create a robust, lightweight feature detecting and matching algorithm that builds upon the foundation set by the TreeBASIS algorithm. The goal is to create a color-based version of the TreeBASIS algorithm that uses less hardware resources than the original, is more accurate in its matching capabilities, can successfully be deployed on a resource-limited FPGA platform, and can process in real time. This thesis first presents the newly designed hardware tri-channel FAST Feature Detector that finds features in color. Next the TreeBASIS algorithm is analyzed to discover what improvements can be made in …

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Application Of Machine Learning And Parametric Nurbs Geometry To Mode Shape Identification, Robert Mceuen Porter Oct 2013

Application Of Machine Learning And Parametric Nurbs Geometry To Mode Shape Identification, Robert Mceuen Porter

Theses and Dissertations

In any design, the dynamic characteristics of a part are dependent on its geometric and material properties. Identifying vibrational mode shapes within an iterative design process becomes difficult and time consuming due to frequently changing part definition. Although research has been done to improve the process, visual inspection of analysis results is still the current means of identifying each vibrational mode determined by a modal analysis. This research investigates the automation of the mode shape identification process through the use of parametric geometry and machine learning.In the developed method, displacement results from finite element modal analysis are used to create …

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Design Exploration And Analysis Of Carbon-Infiltrated Carbon Nanotube Vascular Stents, Darrell John Skousen Sep 2013

Design Exploration And Analysis Of Carbon-Infiltrated Carbon Nanotube Vascular Stents, Darrell John Skousen

Theses and Dissertations

The purpose of this research was to design, develop, and test coronary stent designs composed of carbon-infiltrated carbon nanotubes (CI-CNTs). Coronary stents currently have two major complications: restenosis and thrombosis. CI-CNT stents have potential to address both of these issues, and therefore may provide improved clinical outcomes. CI-CNT stent geometry is patterned using high-resolution photolithography that provide advantages in design possibilities.To develop a coronary stent, a standard design process was followed including: background, design specifications, concept generation, development, analysis, and testing. Background research was first completed and general design specifications for coronary stent performance were compiled. Multiple design concepts were …

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Bipedal Locomotion, Jamie Nichol, Dr. Paul Eastman Sep 2013

Bipedal Locomotion, Jamie Nichol, Dr. Paul Eastman

Journal of Undergraduate Research

Creating an artificial biped (two legged machine) has proven a challenge. The first stage of the project, designing and building the mechanical frame, has required that I study several engineering disciplines. I have also learned many lessons by trial and error.

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Flame Jet Impingement Heat Transfer, Todd Moss, Dr. Brent Webb Sep 2013

Flame Jet Impingement Heat Transfer, Todd Moss, Dr. Brent Webb

Journal of Undergraduate Research

Impinging flame jets are used widely in industry and manufacturing because of their high heat transport characteristics and tight spatial control of the heating. The technique is used in heating or re-heating of stock in the metals and glass industries, and in welding and soldering operations. However, these impinging flame jets are not well understood, and few studies reporting local and average heat transfer characteristics exist in the open literature which might be used by designers (Baukal and Gebhart, 1995a, 199b). The purpose of this research is to experimentally characterize and correlate the local and average heat transfer behavior of …

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Heats Of Combustion For Four Utah Leaf Species, Megan M. Woodhouse, Dr. Thomas Fletcher Sep 2013

Heats Of Combustion For Four Utah Leaf Species, Megan M. Woodhouse, Dr. Thomas Fletcher

Journal of Undergraduate Research

Empirical models have been developed to predict the spread of forest fire models from data about the burning plant species, terrain, and wind conditions. Over the past three years, a research group at Brigham Young University has collected data for ignition temperatures and time to ignition for eight leaf species involved in wildland fires. Four of these species are found in the Southern California chaparral, while the four other species are found in Utah. To further improve the fire models it is desirable to know the heats of combustion for each of the different leaf species. Heats of combustion can …

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Bradford Singley, Bradfor Singley Sep 2013

Bradford Singley, Bradfor Singley

Journal of Undergraduate Research

I am writing to thank you for the generous scholarship. I cannot express my gratitude for this endowment. My wife is having a baby in three weeks, so this truly is a blessing in our lives. This scholarship will help us to make ends meet while allowing me to finish my bachelor’s degree.

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Scanning Impedance Imaging: Optimizing Frequency And Conductivity For Cancer Cell Imaging, Ben Zhang, Dr. Aaron Hawkins Sep 2013

Scanning Impedance Imaging: Optimizing Frequency And Conductivity For Cancer Cell Imaging, Ben Zhang, Dr. Aaron Hawkins

Journal of Undergraduate Research

The ability to scan individual cancer cells that are alive has always fascinated the biomedical research community. Unfortunately, modern day imaging tools, such as atomic force microscopy, electron microscopy and magnetic resonance imaging, have not been successful in achieving that goal. The Scanning Impedance Imaging (SII) project hopes to successfully scan an individual living cancer cell and provide the biomedical community with a new imaging tool.

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Design Of An Aerospike Rocket Nozzle For Integration With A Hybrid Rocket Motor, Jeffrey L. Smith, Dr. Paul F. Eastman Sep 2013

Design Of An Aerospike Rocket Nozzle For Integration With A Hybrid Rocket Motor, Jeffrey L. Smith, Dr. Paul F. Eastman

Journal of Undergraduate Research

Safe, reliable, technologies are needed to launch a new generation of astronauts and space tourists into space. The aerospike nozzle is more efficient than traditional bell shaped nozzles and is safer because of lower combustion chamber pressure. These excellent performance characteristics have never before been tested in conjunction with a hybrid rocket motor. This paper presents the design and testing method for an aerospike rocket.

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Characterization Of Variables In Electrical Killing Of Bacteria: Voltage And Current Geometry, Taylor Turner, Dr. William Pitt Sep 2013

Characterization Of Variables In Electrical Killing Of Bacteria: Voltage And Current Geometry, Taylor Turner, Dr. William Pitt

Journal of Undergraduate Research

As part of a constant pursuit of better health researchers continuously investigate the role of bacteria in disease and infection. Much research today investigates methods for effectively killing unwanted bacteria in the body. Modern antibiotic medications are the most effective method of accomplishing this, but they have their limits. One particular limit of today’s antibiotics is the ability to eliminate biofilms. Biofilms consist of many layers of bacterial cells growing on top of each other, typically attached to a solid surface. Antibiotics cannot penetrate the layers of biofilms, leaving the lower bacteria untouched after treatment. This problem led us to …

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Correlating Skin Vibration With Radiated Sound During Speech, Jason Schulthess, Dr. Scott Thomson Sep 2013

Correlating Skin Vibration With Radiated Sound During Speech, Jason Schulthess, Dr. Scott Thomson

Journal of Undergraduate Research

The intent of this research was to study correlation between the sound that is radiated during human speech and the resulting vibrations that occur in the skin in regions of the head and neck. This report includes results from two parts of this research. First are the measurement results and the comparisons of frequency content obtained from the vibration of the skin at various locations on the head and neck. The second is a presentation of the results examining the frequency content of the measurement device; this study was motivated by preliminary testing results that revealed possible interference due to …

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Design Of Compliant Prosthetic Ankle Joints Using A Kinematic Model, Jason M. Wiersdorf, Robert Robins, Spencer P. Magleby, Larry L. Howell, Robert H. Todd Sep 2013

Design Of Compliant Prosthetic Ankle Joints Using A Kinematic Model, Jason M. Wiersdorf, Robert Robins, Spencer P. Magleby, Larry L. Howell, Robert H. Todd

Journal of Undergraduate Research

The complex system of bones, muscles, ligaments and tendons in the human ankle allow it to withstand high compression impacts, to move in multiple degrees of freedom, and to transfer energy from the leg to the foot while walking or running.

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Asset Tracking System, Jacob Roberts, Dr. Joseph Ekstrom Sep 2013

Asset Tracking System, Jacob Roberts, Dr. Joseph Ekstrom

Journal of Undergraduate Research

RFID, Radio Frequency Identification, is a technology that is beginning to attract the attention of large business. These businesses have complicated and expensive supply chains. RFID promises to streamline asset tracking and reduce supply chain costs.

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Student Digital Portfolio Analysis And Implementation For Byu Students, Keith Kasperson, Dr. Gordon W. Romney Sep 2013

Student Digital Portfolio Analysis And Implementation For Byu Students, Keith Kasperson, Dr. Gordon W. Romney

Journal of Undergraduate Research

The Student Digital Portfolio (StuDigiPort) capstone team shall provide a web application that provides students with a digital or electronic portfolio. A digital portfolio is a collection of student work that is organized similar to a hard copy portfolio. The purpose of the portfolio is to demonstrate the character and abilities of the student. Following are some of the requested features that shall be provided by the Student Digital Portfolio application:

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Xmdf To Gis, Eric Jones, Dr. Jim Nelson Sep 2013

Xmdf To Gis, Eric Jones, Dr. Jim Nelson

Journal of Undergraduate Research

My project is to convert the file system of the program WMS (Watershed Modeling System) from an ASCII text file format to an updated HDF5, or XMDF file format.

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Evaluation Of Three Chemical Coatings On Biomaterial Induced Thromboembolism, Joseph Flinders, Dr. Kenneth Solen Sep 2013

Evaluation Of Three Chemical Coatings On Biomaterial Induced Thromboembolism, Joseph Flinders, Dr. Kenneth Solen

Journal of Undergraduate Research

When blood contacts man-made biomaterials such as those used in artificial organs (e.g. hemodialyzers, oxygenators, etc.) a chain of events occurs that can lead to medical complications as serious as a stroke. These events include proteins (particularly fibrinogen) adhering to the biomaterial’s surface, the accumulation of blood platelets on the fibrinogen to form “Thrombi”, and then the dislodging of the thrombi to form particles (microemboli) that can block downstream arteries or capillaries causing a “stroke” or other cardiovascular event.

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Antibody-Conjugated Polymeric Micelles That Attach To Specific Cancer Cells, Douglas S. Lewis, Dr. William G. Pitt Sep 2013

Antibody-Conjugated Polymeric Micelles That Attach To Specific Cancer Cells, Douglas S. Lewis, Dr. William G. Pitt

Journal of Undergraduate Research

In the past decade, many efforts have been made to improve chemotherapeutic treatments for cancer patients. One of the specific efforts seeks to actively deliver anti-cancer drugs to the target tissue rendering the chemotherapy more efficient and less damaging to nearby uninfected cells.

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Using Computer Simulation To Overcome Shortcomings In Laboratory Relative Density Tests For Soils, Amy L. Cook, Dr. Travis Gerber Sep 2013

Using Computer Simulation To Overcome Shortcomings In Laboratory Relative Density Tests For Soils, Amy L. Cook, Dr. Travis Gerber

Journal of Undergraduate Research

An important soil parameter in geotechnical engineering is relative density. Relative density is a measure of the compactness of a cohesionless soil when compared to the loosest and densest state of the soil.

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Preliminary Liquefaction Hazard Analysis For Bridge Sites Along The 1-15 Corridor Salt Lake County, Utah, Samuel Gilstrap, Dr. T. Leslie Youd Sep 2013

Preliminary Liquefaction Hazard Analysis For Bridge Sites Along The 1-15 Corridor Salt Lake County, Utah, Samuel Gilstrap, Dr. T. Leslie Youd

Journal of Undergraduate Research

The term liquefaction refers to the loss of strength in soils during earthquake shaking. Generally, liquefaction occurs in loose sandy soils which lie beneath the water table. Liquefaction-induced ground failures have been major causes of bridge damage during past earthquakes. My research was to apply state-of-the-art methods for evaluating liquefaction hazard to the bridge sites along the 1-15 corridor in Salt Lake County, Utah. This section of interstate is to be reconstructed over the next 4 years and is one of the largest construction projects ever initiated in Utah. This segment of the highway lies generally parallel to the Salt …

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Air/Polymer Diffraction Grating Coupler, Josh Kvavle Sep 2013

Air/Polymer Diffraction Grating Coupler, Josh Kvavle

Journal of Undergraduate Research

The purpose of my research was to fabricate air/dielectric interface diffraction grating couplers. This report will explain the obstacles that I encountered, and the resulting direction that my research took. In summary, soon after I began my research, a very expensive laser that I depended on for this research was sent away for repairs, so I began doing characterization of a polymer.

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Coarsening Algorithm For Tetrahedral Meshes, Eve S. Crow, Dr. Steven Benzley Sep 2013

Coarsening Algorithm For Tetrahedral Meshes, Eve S. Crow, Dr. Steven Benzley

Journal of Undergraduate Research

In Finite Element Analysis (FEA), there are often times when the mesh on the model needs to be more dense or less dense in a certain region. Refinement and coarsening are the tools used to achieve the desired density of a mesh. The CUBIT toolkit has a coarsening algorithm for triangle surface meshes, but the algorithm for coarsening tetrahedral meshes has not been implemented. I have done some research and have a plan for how it could be implemented.

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A Coordinated Sensing Algorithm For An Ad-Hoc Sensing Network, Britton Quist, Dr. Lee Swindlehurst Sep 2013

A Coordinated Sensing Algorithm For An Ad-Hoc Sensing Network, Britton Quist, Dr. Lee Swindlehurst

Journal of Undergraduate Research

Sensor deployment and placement has a myriad of applications. In everything from wildlife monitoring to underwater microphone surveillance to UAV (unmanned air vehicle) battlefield surveillance the placement of sensors is essential for proper coverage. Often these devices (nodes) communicate as an Ad-Hoc network where data sent to a distant sensor or node will be conveyed across the network by the nodes along the way. In this way, if a node is within the communication range of a single node with other connections, it can communicate with an entire network. This approach is an alternative to the network used in applications …

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High-Speed Tunable Mems Filter, Seth Lloyd, Dr. Richard Selfridge Sep 2013

High-Speed Tunable Mems Filter, Seth Lloyd, Dr. Richard Selfridge

Journal of Undergraduate Research

Optical fiber sensors offer a viable alternative to traditional electronic sensors because of their small size and high immunity to environmental phenomena. While many researchers focus on developing and applying new optical sensing technologies, there is also a great need for better fiber sensor interrogators. An interrogator is the system used to collect the data from the sensor, which with optical sensors usually involves the transfer of an optical signal to an electric signal. The current equipment required for interrogating fiber optic sensors tends to be large, bulky and costly, has high power consumption, and usually performs only the most …

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Cancer Cell Research, Jacey C. Morine, Dr. Aaron Hawkins Sep 2013

Cancer Cell Research, Jacey C. Morine, Dr. Aaron Hawkins

Journal of Undergraduate Research

Cancer cell research is an exciting field of study that has involved a variety of disciplines. In my area of research, I was involved on the electrical engineering side of cancer cell research. We used a small scanning probe that was able to image small objects based on the changes in measured voltage. Eventually, we should be able to image individual cells as we make these tips smaller and smaller.

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Fabrication And Characterization Of Electroosmotic Pumps For Protein Separation And Integration Into Arrow Structure, Donald B. Conkey, Dr. Aaron R. Hawkins Sep 2013

Fabrication And Characterization Of Electroosmotic Pumps For Protein Separation And Integration Into Arrow Structure, Donald B. Conkey, Dr. Aaron R. Hawkins

Journal of Undergraduate Research

Electroosmotic pumps have been fabricated and tested made with a thin-film deposition process compatible with standard silicon processing. This methodology relies upon chemical vapor deposition and chemical sacrificial etching to form long hollow fluid channels. Fabricating pumps in this way is attractive because they can be made on a variety of substrates with high-scale integration and can conveniently be combined with other planar thin-film components. These pumps have significantly smaller core diameters and separation between micropump channels than pumps made with alternative fabrication techniques. Flow rates were measured on these devices for different applied voltages.

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Use Of Signal Processing Methods To Improve Speech Intelligibility In Throat Microphones, Daniel J. Andelin, Dr. Scott Thomson Sep 2013

Use Of Signal Processing Methods To Improve Speech Intelligibility In Throat Microphones, Daniel J. Andelin, Dr. Scott Thomson

Journal of Undergraduate Research

Effective communication, vital to successful operations in many sectors, including military, business, and industry, depends largely on the receiver’s ability to accurately interpret the transmitted signal, generally referred to as speech intelligibility (SI). The presence of elevated noise can be seriously detrimental to SI. To reduce ambient noise in communication through audio microphones, it is possible to use a throat microphone (TM), which senses vocal fold vibrations through the skin on the speaker’s neck, as opposed to detecting the airborne sound wave emanating from the speaker’s mouth, as in standard microphones . Unfortunately, the position of the TM on the …

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Hypothermia-Induced Platelet Aggregation And Fibrinogen Functionality, Adam Broderick, Dr. Ken Solen Sep 2013

Hypothermia-Induced Platelet Aggregation And Fibrinogen Functionality, Adam Broderick, Dr. Ken Solen

Journal of Undergraduate Research

Hypothermia-Induced Platelet Aggregation (HIPA) may pose a significant risk for patients undergoing some surgical procedures. During heart surgery, a patient’s core temperature is typically lowered to reduce tissue damage. Hall et al. (2002) observed that this caused blood platelet aggregation in ~30% of test subjects1 and increases post-operative neurological impairment after hypothermic coronary bypass surgery, possibly through occlusion of small blood vessels by platelet aggregates.2

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